CN103792731A - Wide view field multistage wave plate - Google Patents
Wide view field multistage wave plate Download PDFInfo
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- CN103792731A CN103792731A CN201410042006.5A CN201410042006A CN103792731A CN 103792731 A CN103792731 A CN 103792731A CN 201410042006 A CN201410042006 A CN 201410042006A CN 103792731 A CN103792731 A CN 103792731A
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- liquid crystal
- wave plate
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Abstract
The invention provides a wide view field multistage wave plate. The wide view field multistage wave plate comprises liquid crystal wave plate bodies of the even number and matching liquid or matching glue which is filled into the gaps between the liquid crystal wave plate bodies. The liquid crystal wave plate bodies are attached in pairwise and mutually anti-parallel modes. The wide view field multistage wave plate has the advantages that the wave plate is not sensitive to the incident angle, the working view field is wide, the size and appearance cannot be limited, and the phase retardation quantity can be meticulously adjusted or accurately controlled. The wide view field multistage wave plate has a wide application prospect in the fields of optical detection, optical fiber communications, laser technologies and the like.
Description
Technical field
The invention belongs to optical wave plate technical field, be specifically related to a kind of multistage wave plate.
Background technology
At present, optical wave plate divides there is multistage wave plate (multiple-order wave plate), gummed zero-th order waveplates or claims composite wave plate (compound zero-order wave plate) and true zero-th order waveplates (true zero-order) by structure.Wherein true zero-th order waveplates, the wavelength sensitivity of retardation is low, temperature stability is high, accepts effective angle large, and performance is better than other two kinds of wave plates greatly, but true zero-th order waveplates is often very thin, take quartz as example, the true zero level quartz wave-plate of wavelength centered by its be about at visible light part double refractive inde ~ 0.0092, one 550nm, its thickness only has 15um, and so thin wave plate all can run into many difficulties in manufacture and use.The thickness of multistage wave plate equals multiple all-wave thickness and adds the thickness of required retardation, relatively easily manufacture, but the shortcoming existing is that it is all very sensitive to wavelength, temperature and incident angle, has limited to a great extent the application of multistage wave plate.Gummed zero-th order waveplates or title composite wave plate are by glued together two multistage wave plates.By the slow axis of the fast axle of a wave plate and another wave plate is aimed to eliminate all-wave optical path difference, only leave required optical path difference.Gummed wave plate can improve the impact of temperature on wave plate to a certain extent, has increased the susceptibility of wave plate retardation to incident angle and wavelength but another result is it.
Summary of the invention
The technical problem to be solved in the present invention is to provide the multistage wave plate in a kind of wide visual field, can reduce the susceptibility to incident angle by multistage wave plate, expands the visual field of multistage wave plate, improves the application potential of multistage wave plate at complex condition.
The multistage wave plate in wide visual field that the present invention proposes comprises: the liquid crystal wave plate that quantity is even number and the index-matching fluid of filling between described liquid crystal wave plate or coupling glue; Wherein said liquid crystal wave plate is fitted in adjacent mutual antiparallel mode between two, adjacent two liquid crystal wave plates take the direction perpendicular to logical light face as axle Rotate 180 ° after laminating.
Whether adjustable according to optical delay amount, described liquid crystal wave plate can adopt fixing liquid crystal wave plate or adjustable liquid crystal wave plate.Liquid crystal layer, transparent dottle pin and both sides symmetrically arranged alignment films and transparency carrier successively in the middle of the structure of fixing liquid crystal wave plate comprises.Liquid crystal layer, transparent dottle pin and both sides symmetrically arranged alignment films, nesa coating and transparency carrier successively in the middle of adjustable liquid crystal wave plate structure comprises.
The alignment films of the liquid crystal layer both sides of described every liquid crystal wave plate all takes the antiparallel mode of frictional direction to arrange, the liquid crystal molecule in liquid crystal layer is arranged along face.
The present invention has the following advantages:
1) insensitive to the incident angle of light, receive effective angle can reach ± 20 °, receive effective angle large.Because two liquid crystal cells stack in the contrary mode of tilt angle, can realize the light of different angles incident is carried out to automated optical delay compensation, while being this structure of light process, off-axis effect in first liquid crystal cell is (when Off-axis-light process wave plate, the relative normal incidence of optical delay amount changes to some extent, amount of delay is larger, effective acceptance angle of wave plate is just less) substantially come by second liquid crystal cell compensation, this auto-compensation mechanism has reduced the susceptibility of liquid crystal wave plate to light off-axis angle, thereby can make its effective receiving angle enlarge markedly, referring to Fig. 5.
2) size of wave plate and profile are unrestricted, can as required wave plate be designed to arbitrary shape.
3) the bit phase delay amount of wave plate can accurately be controlled by automatically controlled mode.
The present invention is with a wide range of applications in fields such as optical detection, optical fiber communication, laser technologies.
Accompanying drawing explanation
Fig. 1 is the multistage wave plate structural representation in wide visual field of the present invention;
Fig. 2 is the structural representation of the fixing liquid crystal wave plate in the present invention;
Fig. 3 A and Fig. 3 B are the transparency carrier of liquid crystal wave plate in the present invention and the frictional direction schematic diagram of interior surface orientations film thereof;
Fig. 4 is the structural representation of the adjustable liquid crystal wave plate in the present invention;
Fig. 5 is the schematic diagram that multistage wave plate of the present invention increases effective receiving angle;
Fig. 6 is optical system for testing figure;
Fig. 7 is transmitted light spectrogram.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
What Fig. 1 showed is the enforcement structure of the multistage wave plate in a kind of wide visual field of the present invention, it comprises 4 fixing liquid crystal wave plates (104,105,106,107), and the index-matching fluid of filling between adjacent interfaces or coupling glue (101,102,103), wherein second and the 4th block of fixing liquid crystal wave plate (105,107) relative first and the 3rd block of fixing liquid crystal wave plate (104,106) with perpendicular to logical light face (108,109) direction is that axle has rotated 180 °, and liquid crystal wave plate is fitted in adjacent mutual antiparallel mode between two.
Fig. 2 is the structural representation of fixing liquid crystal wave plate, comprises transparency carrier (201,202), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer 207.Wherein alignment films (205,206) be coated in respectively on the inside surface of transparency carrier (201,202), after the PROCESS FOR TREATMENT such as overbaking, friction, liquid crystal molecule in can induced liquid crystal layer 207 is arranged according to specific direction, makes liquid crystal wave plate have the birefringence optics characteristic of crystal.Liquid crystal layer 207 is that in the interlayer between two transparency carriers (201,202), perfusion nematic liquid crystal material forms, transparency carrier (201,202) by transparent dottle pin (203,204) support, for accurately controlling the thickness of liquid crystal layer 207, make its refractive indices
nbetween 0.05 ~ 0.50.Transparent dottle pin (203,204) can adopt glass fibre, also can adopt glass microballoon or plastics microballon.
Fig. 3 is fixing two transparency carriers (201,202) of liquid crystal wave plate and the frictional direction schematic diagram of interior surface orientations film (205,206) thereof.Alignment films (205,206) be coated on transparency carrier (201,202) inside surface, at transparency carrier (201,202) when fitting into liquid crystal cell, black triangle mark (301,302) on it is overlapped, and (black triangle is contraposition mark when transparency carrier (201,202) is fitted, prevent wrong laminating direction), that is transparency carrier (201,202) is fitted in the antiparallel mode of frictional direction of alignment films (205,206).
Fig. 4 is the structural representation that adopts adjustable liquid crystal wave plate, comprises transparency carrier (201,202), nesa coating (401,402), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer 207.Can accurately control the optical phase put-off of the multistage wave plate in wide visual field of the present invention by adjusting the method for birefringence rate variance of liquid crystal material, wherein a kind of by way of being to utilize the electro-optic birefringent effect of liquid crystal material to realize.First, at transparency carrier (201,202) upper plating nesa coating (401,402), then coated with orientation film (205,206) thereon.Nesa coating (401,402) is generally indium tin oxide target ITO, and its square resistance is 80 ~ 500 Ω/.Utilize electrode to apply the voltage of certain amplitude at nesa coating (401,402), can be liquid crystal layer (207) electric field along optical direction is provided, the sensing of liquid crystal molecule is rotated, thereby change the optics bit phase delay of liquid crystal wave plate.Because the size of electric field can meticulously be controlled, therefore the optical phase put-off of the multistage wave plate in wide visual field of the present invention can regulate meticulously and accurately control.
One embodiment of the present of invention are to use 4 identical liquid crystal wave plates (104,105,106,107), and allow liquid crystal wave plate (105,107) relatively liquid crystal wave plate (104,106) with perpendicular to logical light face (108,109) direction is axle Rotate 180 °, forms the multistage wave plate in wide visual field of the present invention.The thickness of liquid crystal layer of liquid crystal wave plate used is 10 um, Δ
n=0.251@589nm
,25 ℃.In the time of 25 ℃ of environment temperatures, using wavelength is that the continuous wave laser of 532 nm is measured bit phase delay under different angles, and measurement result shows, this multistage wave plate is within the scope of-5 ° ~+5 ° time in incident angle, and the variation of retardation can be ignored.
The susceptibility of an alternative embodiment of the invention in order to prove that the optical delay amount of liquid crystal wave plate group of the present invention changes the angle of incident light: when use optical system for testing test light as shown in Figure 6 changes incident angle between-20 °～+ 20 °, liquid crystal wave plate retardation is with the variation of incident angle.
Light source passes through successively by the polarizer, liquid crystal wave plate and analyzer after collimation lens accurate 1 is straight, then be collimated lens 2 receptions and enter spectrometer system, can accurately control by turntable the incident angle of the relative liquid crystal wave plate of incident light, here take 4 ° as step-length, between-20 °～+ 20 °, change incident angle, obtain the transmitted spectrum under different angles, as shown in Figure 7.Can find out, change incident angle between-20 °～+ 20 ° time, transmitted spectrum changes hardly.Take the transmission peaks at 532nm place as example, change incident angle between-20 °～+ 20 ° time, wavelength maximum offset corresponding to transmission peaks is only about 1nm, and it is very insensitive that the optical delay amount of visible liquid crystal wave plate group changes the angle of incident light.
Above embodiment be multistage wave plate take 4 liquid crystal wave plates composition as example, in actual applications, also can adopt as required the liquid crystal wave plate of other even number amount, as 6,8,10 etc.
Simultaneously; above embodiment is only non-limiting in order to technical scheme of the present invention to be described; those skilled in the art are to be understood that; under the aim and scope prerequisite that do not depart from technical scheme of the present invention; modification to technical scheme of the present invention and be equal to replacement, within also all should being encompassed in the protection domain of claim of the present invention.
Claims (6)
1. the multistage wave plate in wide visual field, is characterized in that, comprising: the liquid crystal wave plate that quantity is even number and the index-matching fluid of filling between described liquid crystal wave plate or coupling glue; Wherein said liquid crystal wave plate is fitted in adjacent mutual antiparallel mode between two, adjacent two liquid crystal wave plates take the direction perpendicular to logical light face as axle Rotate 180 ° after laminating.
2. the multistage wave plate in wide visual field according to claim 1, it is characterized in that, described liquid crystal wave plate is fixing liquid crystal wave plate, be that optical delay amount is non-adjustable, comprise transparency carrier (201,202), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer 207, wherein alignment films (205,206) is coated in respectively on the inside surface of transparency carrier (201,202), liquid crystal molecule in induced liquid crystal layer (207) is arranged according to specific direction, makes liquid crystal wave plate have the birefringence optics characteristic of crystal; Described liquid crystal layer (207) is that in the interlayer between two transparency carriers (201,202), perfusion nematic liquid crystal material forms, and transparency carrier (201,202) is supported by transparent dottle pin (203,204), for accurately controlling the thickness of liquid crystal layer (207).
3. the multistage wave plate in wide visual field according to claim 1, it is characterized in that, described liquid crystal wave plate is adjustable liquid crystal wave plate, be that optical delay amount is adjustable, it comprises transparency carrier (201,202), nesa coating (401,402), alignment films (205,206), transparent dottle pin (203,204) and liquid crystal layer (207); Described transparency carrier (201,202) inside surface is coated with nesa coating (401,402), for changing the optics bit phase delay of liquid crystal wave plate; On nesa coating (401,402), be coated with alignment films (205,206), the liquid crystal molecule in induced liquid crystal layer (207) is arranged according to specific direction, makes liquid crystal wave plate have the birefringence optics characteristic of crystal; Described liquid crystal layer (207) is that in the interlayer between two transparency carriers (201,202), perfusion nematic liquid crystal material forms, and transparency carrier (201,202) is supported by transparent dottle pin (203,204), for accurately controlling the thickness of liquid crystal layer (207).
4. according to the multistage wave plate in wide visual field described in claim 2 or 3, it is characterized in that, the alignment film rubbing direction of described liquid crystal layer (207) both sides is antiparallel, and the liquid crystal molecule in liquid crystal layer is arranged along face.
5. according to the multistage wave plate in wide visual field described in claim 2 or 3, it is characterized in that, the thickness of described liquid crystal layer (207) is controlled by transparent dottle pin, refractive indices
nbetween 0.05 ~ 0.50.
6. according to the multistage wave plate in wide visual field described in claim 2 or 3, it is characterized in that, liquid crystal layer (207) thickness is 10 um, Δ
n=0.152.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410042006.5A CN103792731B (en) | 2013-10-28 | 2014-01-28 | A kind of multistage wave plate of wide visual field |
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|---|---|---|---|
| CN2013105165241 | 2013-10-28 | ||
| CN201310516524 | 2013-10-28 | ||
| CN201310516524.1 | 2013-10-28 | ||
| CN201410042006.5A CN103792731B (en) | 2013-10-28 | 2014-01-28 | A kind of multistage wave plate of wide visual field |
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| Publication Number | Publication Date |
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| CN103792731A true CN103792731A (en) | 2014-05-14 |
| CN103792731B CN103792731B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410042006.5A Expired - Fee Related CN103792731B (en) | 2013-10-28 | 2014-01-28 | A kind of multistage wave plate of wide visual field |
| CN201420055593.7U Expired - Fee Related CN203688947U (en) | 2013-10-28 | 2014-01-28 | Multi-level wave plate |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420055593.7U Expired - Fee Related CN203688947U (en) | 2013-10-28 | 2014-01-28 | Multi-level wave plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154389A (en) * | 2016-08-31 | 2016-11-23 | 武汉优光科技有限责任公司 | A kind of wide-angle phase delay device |
| CN113631996A (en) * | 2019-03-27 | 2021-11-09 | 脸谱科技有限责任公司 | Switchable broadband wave plate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792731B (en) * | 2013-10-28 | 2016-08-24 | 中国工程物理研究院流体物理研究所 | A kind of multistage wave plate of wide visual field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5313562A (en) * | 1991-04-24 | 1994-05-17 | Gec-Marconi Limited | Optical device with electrodes end-to-end with electric field causing homeotropic alignment of liquid crystal in space between ends |
| CN101915953A (en) * | 2010-08-13 | 2010-12-15 | 四川大学 | Wideband quarter wave plate |
| CN103353696A (en) * | 2013-06-18 | 2013-10-16 | 江苏和成显示科技股份有限公司 | Wide-viewing angle wave plate and application thereof |
| CN203688947U (en) * | 2013-10-28 | 2014-07-02 | 中国工程物理研究院流体物理研究所 | Multi-level wave plate |
-
2014
- 2014-01-28 CN CN201410042006.5A patent/CN103792731B/en not_active Expired - Fee Related
- 2014-01-28 CN CN201420055593.7U patent/CN203688947U/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5313562A (en) * | 1991-04-24 | 1994-05-17 | Gec-Marconi Limited | Optical device with electrodes end-to-end with electric field causing homeotropic alignment of liquid crystal in space between ends |
| CN101915953A (en) * | 2010-08-13 | 2010-12-15 | 四川大学 | Wideband quarter wave plate |
| CN103353696A (en) * | 2013-06-18 | 2013-10-16 | 江苏和成显示科技股份有限公司 | Wide-viewing angle wave plate and application thereof |
| CN203688947U (en) * | 2013-10-28 | 2014-07-02 | 中国工程物理研究院流体物理研究所 | Multi-level wave plate |
Non-Patent Citations (1)
| Title |
|---|
| 沈志学，张大勇，罗飞，骆永全，黄立贤，李剑峰: "基于液晶的可调激光衰减器", 《应用激光》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154389A (en) * | 2016-08-31 | 2016-11-23 | 武汉优光科技有限责任公司 | A kind of wide-angle phase delay device |
| CN113631996A (en) * | 2019-03-27 | 2021-11-09 | 脸谱科技有限责任公司 | Switchable broadband wave plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103792731B (en) | 2016-08-24 |
| CN203688947U (en) | 2014-07-02 |
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